/**
 *       Copyright (c) 2012 Lukas Zaruba
 *
 *   This file is part of Robot Playground.
 *
 *   Robot Playground is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   Robot Playground is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with Robot Playground. If not, see <http://www.gnu.org/licenses/>.
 */
package net.zarubsys.commons.log4j.utils;

import java.lang.Thread.UncaughtExceptionHandler;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;

import org.apache.log4j.Logger;

/**
 * Based on loggin facility from Media Solutions Slovakia, a.s.
 * @author Lukas Zaruba, lukas.zaruba@gmail.com
 */
public class LoggingThreadFactory implements ThreadFactory {
	
	private static final UncaughtExceptionHandler eh = new LoggingUncaughtExceptionHandler();
	
	/**
	 * Call this method to create new thread with assigned
	 * uncaught exception handler which will log that exception
	 * into the log4j
	 */
	@Override
	public Thread newThread(Runnable r) {
		ThreadFactory defaultThreadFactory = Executors.defaultThreadFactory();
		Thread thread = defaultThreadFactory.newThread(r);
		thread.setUncaughtExceptionHandler(eh);
		return thread;
	}
	
	public Thread newThread(Runnable r, String name, boolean appendUniqueId) {
		Thread t = newThread(r);
		if (appendUniqueId) {
			name += "-" + t.getId();
		}
		t.setName(name);
		return t;
	}
	
	static class LoggingUncaughtExceptionHandler implements UncaughtExceptionHandler {

		@Override
		public void uncaughtException(Thread t, Throwable e) {
			Logger log = Logger.getLogger(e.getClass());
			log.error("Uncaught exception occured in thread '" + t.getName() + "'. " +
					"Thread has been terminated.\n", e);
			
		}
		
	}

}

